Resonance-inclined optical nuclear spin polarization of liquids in diamond structures

Q. Chen, I. Schwarz, F. Jelezko, A. Retzker, M. B. Plenio

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Dynamic nuclear polarization (DNP) of molecules in a solution at room temperature has the potential to revolutionize nuclear magnetic resonance spectroscopy and imaging. The prevalent methods for achieving DNP in solutions are typically most effective in the regime of small interaction correlation times between the electron and nuclear spins, limiting the size of accessible molecules. To solve this limitation, we design a mechanism for DNP in the liquid phase that is applicable for large interaction correlation times. Importantly, while this mechanism makes use of a resonance condition similar to solid-state DNP, the polarization transfer is robust to a relatively large detuning from the resonance due to molecular motion. We combine this scheme with optically polarized nitrogen-vacancy (NV) center spins in nanodiamonds to design a setup that employs optical pumping and is therefore not limited by room temperature electron thermal polarization. We illustrate numerically the effectiveness of the model in a flow cell containing nanodiamonds immobilized in a hydrogel, polarizing flowing water molecules 4700-fold above thermal polarization in a magnetic field of 0.35 T, in volumes detectable by current NMR scanners.

Original languageAmerican English
Article number060408
JournalPhysical Review B
Volume93
Issue number6
DOIs
StatePublished - 24 Feb 2016

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

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